物理化学学报 >> 1997, Vol. 13 >> Issue (11): 961-964.doi: 10.3866/PKU.WHXB19971101

通讯    下一篇

微型氧弹热量计和C60及C70的燃烧焓

安绪武,陈斌,何俊   

  1. 中国科学院化学研究所,北京 100080
  • 收稿日期:1997-07-28 修回日期:1997-09-24 发布日期:1997-11-15
  • 通讯作者: 安绪武

Combustion Enthalpies of C60 and C70 by Micro-oxygen-bomb Calorimetry

An Xu-Wu,Chen Bin,He Jun   

  1. Institute of Chemistry,The Chinese Academy of Sciences,Beijing 100080
  • Received:1997-07-28 Revised:1997-09-24 Published:1997-11-15
  • Contact: An Xu-Wu

关键词: C60, C70, 微型氧弹热量计, 燃烧焓, 张力能

Abstract:

A micro-oxygen-bomb calorimeter with a bomb of 4.8 cm3 internal volume was constructed in our laboratory. About 10 mg of sample was needed for each combustion experiment. The energy equivalent of this calorimeter was determined with electric energy. The standard diviation of mean from 5 measurements was 0.02 %.The enthalpies of combustion of pure C60 and C70 were determined, △cUm0(C60,cr)=-(25947.1±8.5)kJ•mol-1, △cUm0(C70,cr)=-(29956.1±8.9)kJ•mol. The enthalpies of formation of the two compounds were derived. Using the Laidler-type bond parameters for aromatic hydrocarbons, the estimated strain energies in C60 and C70 molecules were close each other and close to the estimated value from the model compound, corannulene.

Key words: C60, C70, Micro-oxygeng-bomb calorimeter, Combustion enthalpy, Strain energy